Specifically, some of the largest cities deemed extreme urban heat zones include places like:

City	Number (percent) of K-12 students attending public school in extreme urban heat zones
New York, N.Y.	819,719 (85%)
Houston, Texas	326,596 (94%)
Los Angeles, Calif.	279,495 (65%)
San Antonio, Texas	227,707 (91%)
Chicago, Ill.	213,723 (66%)
Dallas, Texas	188,838 (91%)
Phoenix, Ariz.	142,306 (55%)
San Diego, Calif.	130,463 (78%)
Austin, Texas	108,125 (87%)
Philadelphia, Pa.	103,962 (58%)

City

Number (percent) of K-12 students attending public school in extreme urban heat zones

New York, N.Y.

819,719 (85%)

Houston, Texas

326,596 (94%)

Los Angeles, Calif.

279,495 (65%)

San Antonio, Texas

227,707 (91%)

Chicago, Ill.

213,723 (66%)

Dallas, Texas

188,838 (91%)

Phoenix, Ariz.

142,306 (55%)

San Diego, Calif.

130,463 (78%)

Austin, Texas

108,125 (87%)

Philadelphia, Pa.

103,962 (58%)

How extreme climate impacts learning

According to the research, children ages 0-17 are the most vulnerable to heat-related risks. Extreme climates can impact a student's health and development, sleep, behavior and their ability to concentrate on learning. Furthermore, studies show that heat exposure is associated with reduced academic achievement.

5 ways to protect students from extreme climates this summer

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